SiFive Freedom U Series RISC-V Machine

This provides a RISC-V Board compatible with the the SiFive Freedom U SDK.
The following machine is implemented:

- 'sifive_u'; CLINT, PLIC, UART, device-tree

Acked-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Sagar Karandikar <sagark@eecs.berkeley.edu>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Michael Clark <mjc@sifive.com>

include/hw/riscv/sifive_u.h

@@ -0,0 +1,69 @@
+/*
+ * SiFive U series machine interface
+ *
+ * Copyright (c) 2017 SiFive, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2 or later, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef HW_SIFIVE_U_H
+#define HW_SIFIVE_U_H
+
+#define TYPE_SIFIVE_U "riscv.sifive_u"
+
+#define SIFIVE_U(obj) \
+    OBJECT_CHECK(SiFiveUState, (obj), TYPE_SIFIVE_U)
+
+typedef struct SiFiveUState {
+    /*< private >*/
+    SysBusDevice parent_obj;
+
+    /*< public >*/
+    RISCVHartArrayState soc;
+    DeviceState *plic;
+    void *fdt;
+    int fdt_size;
+} SiFiveUState;
+
+enum {
+    SIFIVE_U_DEBUG,
+    SIFIVE_U_MROM,
+    SIFIVE_U_CLINT,
+    SIFIVE_U_PLIC,
+    SIFIVE_U_UART0,
+    SIFIVE_U_UART1,
+    SIFIVE_U_DRAM
+};
+
+enum {
+    SIFIVE_U_UART0_IRQ = 3,
+    SIFIVE_U_UART1_IRQ = 4
+};
+
+#define SIFIVE_U_PLIC_HART_CONFIG "MS"
+#define SIFIVE_U_PLIC_NUM_SOURCES 127
+#define SIFIVE_U_PLIC_NUM_PRIORITIES 7
+#define SIFIVE_U_PLIC_PRIORITY_BASE 0x0
+#define SIFIVE_U_PLIC_PENDING_BASE 0x1000
+#define SIFIVE_U_PLIC_ENABLE_BASE 0x2000
+#define SIFIVE_U_PLIC_ENABLE_STRIDE 0x80
+#define SIFIVE_U_PLIC_CONTEXT_BASE 0x200000
+#define SIFIVE_U_PLIC_CONTEXT_STRIDE 0x1000
+
+#if defined(TARGET_RISCV32)
+#define SIFIVE_U_CPU TYPE_RISCV_CPU_SIFIVE_U34
+#elif defined(TARGET_RISCV64)
+#define SIFIVE_U_CPU TYPE_RISCV_CPU_SIFIVE_U54
+#endif
+
+#endif